Parts Vocabulary
What does OEM stand for?
Original Equipment Manufacturer
What is a part number?
A unique number used to identify a specific vehicle component.
What information should you include when ordering a part?
Part number, description, quantity and vehicle information.
What is a backorder?
A part that has been ordered but is temporarily unavailable and will be supplied later.
How would you professionally tell a customer that a part is unavailable?
“Unfortunately, the required part is currently unavailable. We are checking its expected availability.”
What is the difference between an OEM part and an aftermarket part?
An OEM part is made by the original manufacturer or to the manufacturer's specification; an aftermarket part is produced by another manufacturer.
What is a cross-reference in a parts catalogue?
Information that links one part number to an alternative or equivalent part number.
Write a professional opening sentence for an email ordering an EV coolant pump.
“Dear Supplier, I would like to request availability and pricing for the following EV coolant pump.”
What is supersession?
When an original part number is replaced by a new or updated part number.
Complete professionally: “The part is on backorder, so ______.”
“the repair may be delayed until the part becomes available.”
Explain these terms: OEM, aftermarket, part number and supersession.
OEM refers to the original manufacturer; aftermarket refers to a non-OEM replacement; a part number identifies a component; supersession means an old part number has been replaced by a new one.
A catalogue lists: Part A: 12345 → Superseded by 67890. Which part should you order?
Part 67890, provided the catalogue confirms that it is the applicable replacement.
Write a supplier enquiry requesting availability, price and delivery time for a high-voltage battery cooling pump.
“Dear Supplier, Could you please confirm the availability, price and expected delivery time for the following high-voltage battery cooling pump: Part No. XXXXX? Kind regards.”
A supplier informs you that the requested part is unavailable but offers an alternative part. What should you check before accepting the substitution?
Compatibility, part number, specifications, manufacturer approval and whether the alternative is approved for the vehicle.
How would you tell a customer that the required part is on backorder without promising a delivery date?
“Unfortunately, the part is currently on backorder. We are waiting for confirmation from the supplier and will update you as soon as we have a confirmed delivery date.”
A supplier says: “The original part has been superseded by a new part number.” What does this mean?
The original part is no longer the current part number and has been replaced by an updated or alternative part approved by the manufacturer.
A parts catalogue gives two possible components for the same EV model. What information should you check before selecting the correct one?
VIN, model year, battery/powertrain version, production date, existing part number and catalogue notes.
Write a formal email to a supplier: Part: OBC. Part No.: EV-45821. Quantity: 1. Need: urgent. Request: price and earliest delivery.
“Dear Supplier, Could you please confirm the availability and price of one OBC, Part No. EV-45821? This part is required urgently, so please also confirm the earliest possible delivery date. Kind regards.”
A replacement part supplied under warranty has failed again. Write the opening sentence of a professional warranty complaint.
“Dear Supplier, We are contacting you regarding a replacement component supplied under warranty that has failed again after installation.”
A customer is waiting for a high-voltage component, but the supplier has delayed delivery. How would you communicate this professionally?
“Unfortunately, the supplier has advised us of a further delay affecting the delivery of the required component. We apologise for the inconvenience and will contact you as soon as we receive an updated delivery date.”
A supplier offers an aftermarket replacement for an OEM high-voltage component. What information should you request before considering it?
Compatibility with the specific vehicle/VIN, technical specifications, certification or approval, warranty conditions, installation requirements and confirmation that it is suitable for the EV application.
A cross-reference list shows: OEM 45821 → Superseded 45821-A → Alternative 78945. Explain what you would verify before ordering 78945.
I would verify that 78945 is approved as an equivalent replacement for the specific vehicle/VIN, confirm its technical specifications and warranty conditions, and check the manufacturer's catalogue or supplier information before orderin
Write a complete formal supplier email requesting an urgent EV part. Include the part number, vehicle information, quantity, availability, price and delivery time.
“Dear Supplier, We would like to request one unit of the following component: OBC, Part No. EV-45821, for a 2024 EV [model/VIN]. Could you please confirm availability, unit price and the earliest possible delivery date? If this part is unavailable, please advise whether an approved superseding part is available. Kind regards, Service Department.”
A supplier has sent the wrong component. Write a professional response requesting a replacement and explaining the problem.
“Dear Supplier, We have received the component supplied against our order; however, the part number does not correspond to the component requested. Could you please arrange the correct replacement and advise us of the return procedure for the incorrect part? Please also confirm the expected delivery date for the replacement. Kind regards.”
A customer needs an EV repair urgently, but the required OEM part is on backorder and no confirmed delivery date is available. Explain the situation professionally without blaming the supplier or making promises.
“Unfortunately, the required OEM component is currently on backorder and we have not yet received a confirmed delivery date. We understand that this is inconvenient, particularly as the repair is urgent. We are continuing to monitor availability and will contact you as soon as we receive an update. We apologise for the delay and appreciate your patience.”